Trimming device for sewing-machines



(No Model.)

J. BIGELOW,

TRIMMING DBVIGE FOR SEWING MAGHINES. No. 341,790. Patented May 11, 1886.

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JOHN BIGELOW, or PHILADELPHIA, PENNSYLVANIA.

TRIMMING DEVICE FDR SEWlNG lViACl-HNES.

JGITEGATEGN forming part of Letters Patent No, 341,790, dated May 11,1886.

Original application filed June 5, 1879. Divided and this applicationfiled November 8, 1881. Serial No. 45,391. (No model.)

To all whom, it may concern:

Be itkuown that 1, JOHN BIGELOW, a eiti zen of the United States,residing a'twPhiladelphia, in the county ofPhiladelphia and State ofPennsylvania, have invented certain'new and useful Improvements inTrimming Devices for SewingMaehines; and I do hereby declare thefollowing to be a full, clear, and exact description ofthe invention,such as will enable others skilled in the art to which it appert-ai usto make and use the same, reference being had to the accompanyingdrawings, and to letters or figures of reference marked thereon, whichform a part of this specification, this application.

being a divisional application of original application filed June 5,1879, and patented August 29, 1.882, No. 263,467.

Figure 1 is a side view of the present invention as applied to use on anAmerican button-hole machine, so called. Fig. 2 is a like View from theopposite side.

This invention relates to trimming devices for sewing-machines, in whichtwo shear-cutting edgesone stationary the other moving or movable areemployed; and the novelty consists,more particularly, in combining withthe stitch-forming mechanism of asewing machine a shear-trimmcr composedof a fixed and a movable cutter, the movable cutter being adjustable anddevised to regulate the position of its cutting-edge to the sewingmechanism and to the cutting-edge of the cooperating cutter; and incombining with the stitch forming mechanism of a sewingmachine ashear-trimmer having a movablebladc or out ter and a stationarycooperating cutter, each adjustable independently of the other, so as toregulate the position of the cuttingpointrelative to the sewingmechanism, the two cutters having their edges held together by springpressure; and in combination with the stitchi'orming mechanism of asewing-machine and the movable cutter or blade of a trimming de' vice, astationary cutter adj nstable lengthwise to regulate the position of itscutting-edge relative to the sewing mechanism and to the cuttingedge ofthe movable cutter; and in the combination, with the stitch-formingmechanism of a sewing-machine and a movable cutter, of a stationarycooperating cutter and a support below the work-plate of the sewingmachine, to which support the said cutter is secured, said cutter alsobeing adjustable lengthwise, so as to regulate the position of the saidcutter to the work-plate and to the movable cutter, substantially asdescribed.

For convenience in describing and explain ing my said invention, I haveused an American button-hole overseaming and sewing machine; but it isevident that my invention can readily be applied by the exercise ofmerely mechanical skill to any of the ordinary sewing-machi'nes'now inuse, and that the adj ustable stationary blade need not necessarily comescrews which it into the slots (1. a in the lower part of said blade,and is so adjusted that it will come up through the work-plate L justfar enough to secure the best results in the operation of the machine. Ihave now shown this as accomplished by having the upper or cutting endof blade H very slightly above the face of the plate L, and I may thusmove this blade 'H, as above described, from time to time toward thecuttingedge, as may be found necessary to allow for grinding and wear inuse. The upper blade, G, is mo'vably attached by means of slot (1. and asetscrew to the end F of level F, which lever rocks at F on a stud setin the part .1, by the movement of link E, which is jointed to saidlever F at F at one end, and to the rocking lever D at the other end.This lever D receives a rock ing motion from cam d. 3y properly timingthe movements of the upper blade with the needle-bar the two blades areopen when the feeding takes place, and when closing out or trim thefabric with the descending movement of the needle-bar. A spring, K.(shown as secured at K to the plate A, and acting on the upper blade armat K,) will serve to keep the cuttingedges together and assist in makinga draw out, and cause them to have a shearing action suited to divideknit goods and other textile fabrics. The two blades can be readilyadjusted to out different thicknesses of fabric or be moved out of theway, if at any time it is desirable to dispense with the cuttingattachment.

In the drawings Ihave shown this machine as cutting in advance of theline of sewing, the two operations being performed almost at the sametime; but I make no claim on that feature of this invention in thiscase, as all that is fully described and claimed in Division A of thissame case.

Having thus described my invention, what I consider new, and desire tosecure by'Letters Patent, is-

1. In a sewing and trimming machine, and

' in combination with the stitch-forming'mech anism thereof, ashear-trimmer comprising a fixed and movable cutter, having for itsmovable cutter a bar or plate provided with the cutting-edge at one end,and being adjustable lengthwise on its carrier,toregulate the positionof said cutting-edge relatively to the sewing mechanism and to thecutting-edge of the co-operating cutter, substantially as described.

2. In a sewing and trimming machine, and

in combination with the stitch-forming mechanlsm thereof, ashear-trimmer having a movable cutter or blade, and a stationary co-op-3. In asewing and trimming machine, and in combination with thestitch-forming mechanism of the sewing-machine and the movable blade orcutter of the trimming device, a stationary cutter formed of a bar orplate provided with the cutting-edge at one end, and being adjustablelengthwise, to regulate the position of said cuttingedge relatively tothe sewing mechanism and to the cutting-edge of the movable cutter, saidcutters having their edges held in contact with each other byspring-pressure in cutting, and thereby having a shear action suited todivide knit goods and other textile fabrics, substantially as described.v v

4. In a sewing and trimming machine, and in combination with thework-plate and stitchforming mechanism of the sewing-machine, and withthe movable cutter of a shear-trimming device, a stationary co-operatingcutter formed of a bar or plate and a support-below the work-plate, towhich support said bar is secured, said bar having the cutting-edge atits upper end and being adjustable lengthwise, to regulate the positionof said cutting-edge relatively to the work-plate and stitch-formingmechanism and to the cutting-edge of the movable cutter, substantiallyas described.

In testimony whereofI affix my signature in presence of two witnesses.

JOHN BIGELOVV.

\Vitnesses:

JAS. GREENWOOD, JOEL A. SEAL.

